Disclosed is a method of authorizing a user for accessing a server and/or for receiving of an on-line service and the steps of: capturing biometric data of the user using the sensor on a ME; forming from the biometric data a biometric template on the IDS and storing the biometric template on the MED; and via the IDS allowing access to a server by the user providing to the IDS, via the MED, matching biometric data and a biometric template. On the MED, a local check can be made for a match between biometric data of the user that are captured using the sensor on the MED and biometric data read out of the memory.